Build of docker image stx-keystone-api-proxy fails on CentOS, since
the docker image includes sysinv, which requires zerorpc.
The code for sysinv may still import zerorpc, but the image will not
run sysinv or zerorpc, so this fix is sufficient to get the image to
build.
TEST PLAN:
PASS: Build stx-keystone-api-proxy docker image on CentOS
Closes-Bug: 1997977
Signed-off-by: Alyson Deives Pereira <alyson.deivespereira@windriver.com>
Change-Id: I30da6ec139f4cd31759eb249f008e1101e02e713
806e3de5e3